Popa Sawrahan

Popa Sawrahan was the 20th king of Pagan Dynasty of Burma and the eighth king of Tampavati period of Bagan. He was notable for restarting the Burmese calendar in Bagan history and one of the two Sawrahan kings of Bagan Dynasty.
He was advised to reign over Pagan by his student, Queen . In 640 AD, he encountered or "the number needed to demolish year number". He subtracted 560 years from year 562, leaving a remainder of 2 years. Burmese people have been counting from the year two without restarting the calendar again.

Legend

Sawrahan is the former monk seized the throne after King Htun Chit died in 613 CE. He launched the Burmese calendar on 21 March 640 CE, with the starting date of 22 March 638. Popa Sawrahan made peace with the royal line by giving his daughter to Shwe Ohnthi, son of Htun Chit and rightful heir, and making his son-in-law the heir apparent. Popa Sawrahan died in 640 soon after his new calendar was launched, and Shwe Ohnthi succeeded, restoring the Pyusawhti line.